Java 7u51 and Self-Signed SMS Screens
There can be two potential causes to this issue :
1. The NCC version is earlier than 4.4.1.5 or 5.0.1 - All versions released before these two versions used to be self-signed.
2. There are self-signed Interim Patches installed on the NCC system.
Java 7 update 51 no longer allow unsecured signatures on the default security settings.
There are two possible solutions for this issue :
1. Use a deployment ruleset which is available from java 7u40 ; or